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<?php $num = base_convert("ffffffffffffffff",16,2); $arr = str_split($num); for ($i=0,$max = count($arr)-1; $i <=$max; $i++) { $arr[$i] = ($arr[$i] == '1')? '0' : '1'; } $str = join('',$arr); $converted = base_convert($str,2,10); $result = gmp_add($converted, "1"); var_dump(-$result);
Output for git.master, git.master_jit, rfc.property-hooks
object(GMP)#2 (1) { ["num"]=> string(21) "-18446744073709552047" }

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